No, it isn’t. Limited liability does not shield executives from criminal prosecution. If an LLC defrauds another party, the perpetrators are both criminally and civilly liable; this is true in every common law country you can think of. Limited liability corporations enjoy a limitation of civil liability (i.e. the shareholders cannot be held liable for more than the company is worth). This limitation is not exhaustive in the case of fraud or criminal negligence. In practice it is of course possible that people “get away with” both, but that is a failing of law enforcement, not limited liability itself.